Protective rolling screen for windows, doors, and the like



Dec. 25, 1934. A. HIMMELMANN 1,985,828

PROTECTIVE ROLLING SCREEN FOR WINDOWS, DOORS AND THE LIKE 3 Sheets-Sheet1 Filed June 23, 1930 In. l/Qrtid"? Dec. 25, 1934.

A. HIMMELMANN PROTECTIVE ROLLING SCREEN FOR WINDOWS, DOORS, AND THE LIKEs Sheets-Sheet 2 Filed June 23, 1930 Dec. 2 5, 1934. A. HIMMELMANN1,985,828

PROTECTIVE ROLLING SCREEN FOR WINDOWS, DOORS, AND THE LIKE PatentedDec-25,1934 a 1,9'8'5,828'

UNITED STATES PATENT orrlce PROTECTIVE ROLLING SCREEN non wnmows, noons,AND 'rrm mm Adolf Himmelmann, Dortmund, Germany Application June 23,1930, Serial No. 463,209 In Germany June 26, 1929 3 Claims. (cl. 189-56)The present invention relates to a rolling tion of a further modifiedconstruction of the screen as a protection for doors, windows andflexible connection between the cross bars, the like which is providedwith a safety mech- Fig. 6 is a front elevation of a rolling screenanism to prevent the screen from being lifted up showing a variety ofshapes of the corrugated b from the outside by unauthorized persons. Thebars with and without cross bars which may be advantages of the newrolling screen consist above provided on the same screen,

all things in the possibility of its being rolled up. Figs. 7 and 7a areperspective views of conwith ease, combined with a smallwinding radius,necting members for cross beams and corrugated and in the connection ofthe individual parts of bars,

the screen being protected against manipulation Fig. 8 is a section online 10-10 of Fig. 6 10 from the outside, provision being, however, madethrough a flat-iron member serving as 2, connectfor allowing a clearview and a ready passage of i member With a pressedout distance P lightthrough the screen. Fig. 9 is a section on line 11-11 of Fig. 6 of Thenew rolling screen consists essentially f a modified construction of aflexible connection 15 horizontally disposed cross beams and corrugated0f the u ed bars, 15 bars which are arranged zigzag fashion and serveFig. 10 is a front elevation of a screen confor supporting the beams andfilling the openi sisting of cross bars and corrugated bars, the'whereby the cross beams and corrugated bars are CIOSS beams andConnecting members being eX- fiexibly connected by special connectingmeme u f d in Va designs on the a c ee bers. In accordance with theinvention, the rolland 20 ing screen is additionally provided with asafety l is a Section through 0 0n the line mechanism which prevents thescreen from being v raised from the outsid by unauthorized persons. erolling Screen according to g- 1 cons sts This is efiectedby springpawls whi h a of horizontally disposed cross bars or cross beams curedto the cross beams or corrugated bars and 1 0f fi Corrugated barelikewise made 25 connected withmembers fastened to the winding o fietm dinto a Zigzag p are drum. The pawls engage-with notches on th providedbetween two such cross beams and serve fixed guide of the screen orframe when the for Supporting the cross beams and for filling the screenis unfolded. The pawls are lifted out of ,epening- These Cress beams areflexibly co ectthenotches, when the screen is being rolled up, edtogether'by a fiat-iron member A -i n 30 by means of tension members.set on edge in respect of the plane of the screen In accordance with theinvention, the connectmay be interposed s a Second cross beam ingmembers not only vary with regard to their T rolling Sereen' formed inthis manner 15 shape, but also in the manner i whi h they are suspendedfromdiscs by means of bolts and link connected with the cross beams andcorrugated members 4 as to be adjustable, these discs 35 bars,flexibilit of the mentions being, ing fastened to the drum 6. A tensionmember ever, ensured 7, e. g., a chain, is secured to the disc and pro-A variety of constructions of the new rolling vided with a tighteningdevice 7' yieldable' screen h the safety mechanism is shown in member7". The free end of the tenslon member 40 the accompanying drawings in1s connected with a pawl 8 arranged on the inner 40 i I Z side of therolling screen. The pawl is under wifi th e iaieit fiaitilifiitipitfdiit iiii? t action of a spring which allows it a drop tatabla drum f n vs mto a notch 9 of the frame 9 'themoment both a parts register in thebOttOmPOSItlOD of the roll- 2 1s from elevatlon' cross ing screen. Inthis manner connection is estab- 45 a F19 P stmwmg the lished'betweenthe. screen in the-unfolded posi- Structmn Qffthe flexlble conneiitmnbetwee? two tion and the fixed casing of the screen which f fi makes itimpossible for the screen to be raised, 3 5 slde elevatmn of modlfiedfor instance, from theoutside by unauthorized t 01 the flexiblecdnnectmn between the persons." However, if the drum 6,'which is not 50corru a ed bare and f e m r accessible from the outsideQis revolved, thescreen Fig. 4s'hows another modified construction of is in the firstinstance drawn forward from the the flexible connection between twocorrugated positionin which it is suspended from the drum bars, h with alittle play, but without lifting it, and the Fig. 5 is a front elevationand Fig. 5a, a sec pawls 8 pulled out of the notches 9 during this 55with perforations for'inserting the flat-iron member 3.serving for theflexible connection, as shown in Fig. 2. Two holes 10 are punched whichare connected by a narrow slot so that two lugs 11 are left standingbetween the holes 10. To allow the connecting flat-iron member to beinserted, these lugs are bent outwardly in the direction of the arrowsa: and then bent back again in the direction of the arrows yinto asquare aperture 13 in the inserted flat-iron member. In this manner thefiat-iron member is rigidly connected with the-cross beamso that noshifting can occur.

flat-iron member 3 may be provided at the ends with punched lugs ortongues 3' which, by acting as limiting stops, prevent the cross beamsfrom falling out of the corrugated bars. They are provided with squareprojections 3" on both longitudinal sides which serve as distance piecesand abutments. According to Fig. 2a, the corrugated bars are fitted atspecific points with elongated perforations through which the flat-ironmember 3, which serves as a connecting member, is passed with a certainamount of play so that two corrugated bars and one cross beam areclamped.-

together. After passing the flat-iron 3 through the elongatedperforations, the flat-iron member is bent over at the ends, thusforming the flexible connection between the bars and beams. The punchedtongues 3 do not follow the bending action, but remain square so thatthey act as stops and prevent the flat-iron members from dropping out ofthe perforations of the corrugated .bars. In case the cross beam 1" isformed as a flat-iron member set on edge, as shown in Fig. 3, theflat-iron member, which in other respects is formed as described in theforegoing, is riveted to the cross beam 1, while the bent ends engagewith perforations in the corrugated bars. Fig. 4 shows anotherconstruction in which the punched tongues 3' are dispensed with and theend 3' of the fiat-iron member is bent over twice outside theperforation in the corrugated bar, whereby security is aiforded againstthe member slipping out of the perforations.

According to 5, the ends of the connecting fiat-iron member 3 are.ioggled above the corrugated bars, mandrels or rivets 12 being insertedin the joggled portion which project in the joggling direction. E

Fig. 6 shows a rolling screen in which the cross beams and corrugatedbars are not only connected in various ways as described above, but inwhich the corrugated bars no longer have a straightline zigzag form, butrather a zigzag shape composed of curves and straight lines.

According to Fig. 6, the corrugated bars and cross beams are connectedin the upper portion of the rolling screen by a two-piece flexiblemember as shown in Figs. 7 and 71;. One of the flexible members 1'7 fitsinto the other flexible member 17', both being U-shaped. A mandrel orrib14 is provided on the web of the U-section, the rib being passed througha corresponding perforation in the cross beam or corrugated bar andconnected therewith by welding or riveting. The

flanges of these flexible members are fitted with perforations 15 whichmay be arranged either concentrically or eccentrically. After fittingthe flexible-members together, a bolt 16 is passed through theprojecting ends and countersunk to form rivet heads, or a hollow boltmay be inserted and the rims expanded or beaded over. not shown. Thecorners of the flanges of the flexible members are rounded off on oneside so that the other edgeawhich remain square, may support each otherand thus prevent the rolling screen from sagging and-bulging outwards inits vertical plane. Each fleiiible member is preferably formed of aT-section, the web of which is cut away to the required width for therib 14. The flanged ends are provided with perforations and bent squareat the requisite distance apart.

In Fig. 8 on the line 10-10 of Fig. 6, and in Fig. 9 on the line 1111 ofFig. 6 are shown other constructions of the flexible connections whichare especially adapted for connecting corrugated bars. This againconcerns the previously described flat-iron member 3 which is furnishedwith square projections as distance pieces on both longitudinal sides.The ends of the inserted flat-iron member projecting from theperforations of the corrugated bars are bent outwardly in one operationand tongues 3' punched out in the direction oppositely disposed to thebendingdirection. As sh wn in Fig. 8, the operation of making the co'ection by means of a flat-iron member may be simplified by pressing outthe middle portion 18 of the fiat-iron member so that this pressed outportion serves as a distancepiece between the corrugated bars.

Figs. 10 and 11 show a fifth construction of the connecting members fora rolling screen consisting of cross beams and corrugated bars. As theconnecting members hereby used are made in such a manner that they serveat the same time as supporting members, the flat-iron corrugated barsmay in this case likewise be dispensed with. The member serving asflexible connection is here formed by a vertically disposed bar 19 ofT-section. The notched ends of the bars are passed through correspondingperforations in the cross beams and corrugated bars and folded into eyes19'. Short lengths of tubing 20 are passed through these eyes to act asconnecting media, the tubes being headed over at the ends to preventthem from dropping out. A through bar 21 of round-iron may, however, beused in place of the tubing, and in this case the' bar 21 may profitablybe bent to a zigzag form similar to a corrugatedbar, thus dispensingwith a separate flat-iron corrugated bar, and atthe same time reducingthe number of cross beams. These supporting connecting bars 19 are bentoutwardly at their middle portion -19" to allow the diameter of therolled screen to be kept as small as possible.

In addition, the cross beams 1 of flat-iron may be fitted at theiroutside edges with a covering bar arranged square to the beam in theplane of the screen, the construction being such that with two adjacentcross beams one of the bars reaches over the other, thus covering theflexible connection and safeguarding it from external manipulations.

quired, ample flexibility and greater security being ensured by the openspaces in the fields being more closely filled.

What I claim is:-

1. A rolling screen for windows, doors, and the like, comprising aplurality of partly rectilinear grid-like cross members extendingparallel to the rolling axis, a plurality of jointed connecting membersextending at right angles to the cross members, and a plurality oflinks, a number of said cross members consisting of flat bars which aredisposed edgewise to the plane of the screen and jointed to each otherby said links in such a manner that the ends of the links pass throughcorresponding openings in the flat bars of the cross members and areoffset.

2. A rolling screen according to claim 1, in which a flat bar is bent toa zigzag or wave form and is associated at both longitudinal sides withrectilinear flat bars to form a reinforced structure, and therectilinear bars being connected by the links with a bent bar at thereversal places of the zigzag portions.

3. A rolling screen according to claim 1, in which the links are ofisetat their projecting ends and are provided with rivet heads or lugs forlimiting the joint movement of the'bars.

ADOLF HINIMELMANN.

